First of all, nice video. I liked it.
Just 2 things:
Commandos / Mercenaries don't use Medium Armor
You didn't say a lot about cover, there are moments in which I think it's useful. For example you can root for 2 sec a Marauder, gain some space, go in cover and throw at least 2 heals.
Or, in the strategy against the Juggernaut Force Push, if the Juggernaut is bad (or you use the CC breaker in time), you can go in cover so he can't charge, while you can heal to full.